Put a few drops of benedict's solution in a test tube of the substance that you want to test for glucose and place it in a warm waterbath. Leave it for a few minutes. It will be blue, initially. If there is any change in colour, glucose is present.
 |
| Figure 1: Test for sugar scale |
Put a drop of iodine solution on whatever you wan to test for starch (let's say, a cornflake). If there's a change in colour, starch is present.
 |
| Figure 2: The test for starch, using a potato as an example |
Just saying, for the tests you could try being a bit more specific with the colour changes
ReplyDeleteTest for glucose: blue >> green/yellow/orange
Test for starch: yellow/brown >> blue/black